"We're able to produce absolutely stunning websites and mobile apps with great interaction design. Interfaces that are smooth and fun and let us understand information without even trying. But when it comes to email clients, we get a bit of a boring feeling, like using an old piece of software from 10 years ago. I think we can do better. So let's do that." Great ideas and beautiful design by Tobias van Schneider, but why he would forcefully shoehorn this clearly digital UI into Mac OS X is beyond me. It has no place there. This just screams Metro.

Email HASN'T changed. It's still RFC822 format messages, delivered over a network via UUCP or SMTP. Just because your retarded client has an HTML rendering engine built in and executes attachments by default doesn't make it a different protocol.